BICYCLE FRAME AND BICYCLE, AND BABY CARRIAGE USING SAME CAPABLE OF TWO-WHEEL AND THREE-WHEEL CONVERSION

摘要

A cycle frame easily converted from a bicycle to a tricycle and vice versa, and to a cycle and a baby carriage using same. The cycle includes a main frame including a main support and a pair of sub-supports branching from the main support, a pair of conversion frames, front end portions thereof being hingeably connected to rear end portions of the sub-supports such that the distance between rear end portions thereof is adjustable, a pair of connection brackets respectively connected to the rear end portions of the conversion frames, a fork frame rotatably connected to the front end portion of the main support, a front wheel shaft rotatably connected to the fork frame, a main rear wheel shaft, both ends thereof being respectively and separably connected to the connection brackets, and a propelling pedal rotatably mounted on the main support and drive-connected to the main rear wheel shaft.

主权项

1. A cycle frame for a cycle capable of bicycle-tricycle conversion, comprising:
a main frame comprising a main support on which a saddle is mounted and a pair of sub-supports branching from the main support; a pair of conversion frames, front end portions of the pair of conversion frames being hingeably connected to rear end portions of the pair of sub-supports such that a distance between rear end portions of the conversion frames is adjustable; and a pair of connection brackets respectively connected to the rear end portions of the conversion frames, wherein a rear wheel shaft is fitted into the pair of connection brackets.